N.S.
If you mean saving them, I immediately write the date on the back of each project. You might think you'll remember but you won't! Also, write any details you think you might want to remember, like her teacher's name and grade.
I purchased a large scrapbook and I just pop the project (if it's a drawing or artwork) in the scrapbook. If it's a big project I take a picture of her with it because you certainly can't keep all the big projects forever!
She will love looking back at all her projects when she grows up. Taking a picture of her holding it also adds to the memory--you know what she looked like when she brought it home. :)